/*
 *
 *
 * Copyright 2016 The Symphony Software Foundation
 *
 * Licensed to The Symphony Software Foundation (SSF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 */

package org.symphonyoss.symphony.clients.model;

/**
 * @author Frank Tarsillo on 11/17/17.
 */

public enum RestApiVersion {

    v1_46_0("1.46.0"),
    v1_47_0("1.47.0"),
    v1_48_0("1.48.0"),
    v1_49_0("1.49.0");


    private String apiVersion;

    RestApiVersion(String apiVersion) {
        this.apiVersion = apiVersion;
    }

    public boolean isCompatible(String actual) {

        return versionCompare(actual, apiVersion) >= 0;


    }


    /**
     * Compares two version strings.
     * <p>
     * Use this instead of String.compareTo() for a non-lexicographical
     * comparison that works for version strings. e.g. "1.10".compareTo("1.6").
     *
     * @param str1 a string of ordinal numbers separated by decimal points.
     * @param str2 a string of ordinal numbers separated by decimal points.
     * @return The result is a negative integer if str1 is _numerically_ less than str2.
     * The result is a positive integer if str1 is _numerically_ greater than str2.
     * The result is zero if the strings are _numerically_ equal.
     * @note It does not work if "1.10" is supposed to be equal to "1.10.0".
     */
    private int versionCompare(String str1, String str2) {
        String[] vals1 = str1.split("\\.");
        String[] vals2 = str2.split("\\.");
        int i = 0;
        // set index to first non-equal ordinal or length of shortest version string
        while (i < vals1.length && i < vals2.length && vals1[i].equals(vals2[i])) {
            i++;
        }
        // compare first non-equal ordinal number
        if (i < vals1.length && i < vals2.length) {
            int diff = Integer.valueOf(vals1[i]).compareTo(Integer.valueOf(vals2[i]));
            return Integer.signum(diff);
        }
        // the strings are equal or one string is a substring of the other
        // e.g. "1.2.3" = "1.2.3" or "1.2.3" < "1.2.3.4"
        return Integer.signum(vals1.length - vals2.length);
    }

}


